开发手账（一）

本文主要是介绍开发手账（一），希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

一、 关于设计

（一）数据库

1. 确定外键标识，需判断该外键是否有可能被修改。如菜单id，菜单code，菜单名，前两者都可做外键，后面一个则不应做外键。

二、关于组件

（一）POI

1. 文档页数统计

import lombok.extern.slf4j.Slf4j;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.ofdrw.reader.OFDReader;
import org.springframework.web.multipart.MultipartFile;import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Path;
import java.nio.file.Paths;
@Slf4j
public class LvDocPageCounter {public static final String DOCUMENT_PAGE_TEMP = "DOCUMENT_PAGE_TEMP";public static int getPageCount(String filePath) {String fileType = getFileType(filePath);try {switch (fileType) {case "pdf":return getPdfPageCount(filePath);case "docx":return getDocxPageCount(filePath);case "doc":return getDocPageCount(filePath);case "ofd":return getOfdPageCount(filePath);// Add more cases for other document types as neededdefault:log.warn("不支持的文件类型:{}", filePath);return 1;
//                throw new IllegalArgumentException("Unsupported file type");}} catch (Exception e) {log.warn("读取文件异常:{},{}", filePath,e);return 0;}}/*** 文件类型* @param filePath* @return*/private static String getFileType(String filePath) {int dotIndex = filePath.lastIndexOf('.');if (dotIndex == -1 || dotIndex == filePath.length() - 1) {log.warn("文件名中没有找到扩展名:{}", filePath);return "";}return filePath.substring(dotIndex + 1).toLowerCase();}/*** 获取PDF文档页数* @param filePath* @return* @throws IOException*/private static int getPdfPageCount(String filePath) throws IOException {try (PDDocument document = Loader.loadPDF(new File(filePath))) {
//            PDDocument document = new PDDocument();int numberOfPages = document.getNumberOfPages();document.close();return numberOfPages;}}/*** 获取doc文档页数* @param filePath* @return* @throws IOException*/private static int getDocPageCount(String filePath) throws IOException {
//        try (InputStream inputStream = new FileInputStream(filePath);
//             HWPFDocument document = new HWPFDocument(inputStream)) {
//            int pageCount = document.getSummaryInformation().getPageCount();
//            document.close();
//            return pageCount;
//        }try (InputStream inputStream = new FileInputStream(filePath)) {com.aspose.words.Document doc = new com.aspose.words.Document(inputStream);int num = doc.getPageCount();doc.cleanup();return num;} catch (Exception e) {e.printStackTrace();return 0;}}/*** 获取docx页数* @param filePath* @return* @throws IOException*/private static int getDocxPageCount(String filePath) throws IOException {
//        try (InputStream inputStream = new FileInputStream(filePath);
//             XWPFDocument document = new XWPFDocument(inputStream)) {
//            int pages = document.getProperties().getExtendedProperties().getUnderlyingProperties().getPages();
//            document.close();
//            return pages;
//        }try (InputStream inputStream = new FileInputStream(filePath)) {com.aspose.words.Document doc = new com.aspose.words.Document(inputStream);int num = doc.getPageCount();doc.cleanup();return num;} catch (Exception e) {e.printStackTrace();return 0;}}/*** pdf页数* @param filePath* @return* @throws IOException*/private static int getOfdPageCount(String filePath) throws IOException {Path ofdFile = Paths.get(filePath);OFDReader ofdReader = new OFDReader(ofdFile);int numberOfPages = ofdReader.getNumberOfPages();ofdReader.close();return numberOfPages;}/*** 获取缓存文件页数* @param inputStream* @param originalFilename* @return*/public static Integer getPageCount(MultipartFile inputStream, String originalFilename) {try (InputStream inputStream1 = inputStream.getInputStream()) {return getPageCount(inputStream1,originalFilename);} catch (IOException e) {log.warn("读取文件异常:{},{}", originalFilename,e);return 0;}}// Add methods for other document types as needed
}

2. 文本提取

import cn.hutool.core.io.FileUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.io.FilenameUtils;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.text.PDFTextStripper;
import org.apache.poi.hwpf.HWPFDocument;
import org.apache.poi.hwpf.extractor.WordExtractor;
import org.apache.poi.xwpf.extractor.XWPFWordExtractor;
import org.apache.poi.xwpf.usermodel.XWPFDocument;
import org.ofdrw.converter.export.TextExporter;import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.concurrent.atomic.AtomicInteger;/*** @author yilv* @version 1.0* @description: TODO* @date 2023/11/16 16:12*/
@Slf4j
public class LvDocTxTHunter {private static AtomicInteger  UPPER_LIMIT=new AtomicInteger(50);/*** 读取文档内容* @param filePath* @return*/public static String readText(String filePath) {int pageCount = LvDocPageCounter.getPageCount(filePath);if (pageCount >UPPER_LIMIT.get()) {log.warn("文件过大:{},{}", filePath,pageCount);return "";}String fileType = getFileType(filePath);try {switch (fileType) {case "pdf":return readPdfText(filePath);case "doc":return readDocText(filePath);case "docx":return readDocxText(filePath);case "ofd":return readOfdText(filePath);// Add more cases for other document types as neededdefault:log.warn("不支持的文件类型:{}", filePath);return "";}} catch (IOException e) {log.warn("读取文件异常:{},{}", filePath,e);return "";}}/*** 获取文件类型* @param filePath* @return*/private static String getFileType(String filePath) {int dotIndex = filePath.lastIndexOf('.');if (dotIndex == -1 || dotIndex == filePath.length() - 1) {log.warn("文件名中没有找到扩展名:{}", filePath);return "";}return filePath.substring(dotIndex + 1).toLowerCase();}/*** 获取pdf文本* @param filePath* @return* @throws IOException*/private static String readPdfText(String filePath) throws IOException {try (PDDocument document = Loader.loadPDF(filePath)) {String text = new PDFTextStripper().getText(document);document.close();return text;}}/*** 获取doc文本* @param filePath* @return* @throws IOException*/private static String readDocText(String filePath) throws IOException {try (InputStream inputStream = new FileInputStream(filePath);HWPFDocument document = new HWPFDocument(inputStream)) {WordExtractor extractor = new WordExtractor(document);String text = extractor.getText();document.close();return text;}}/*** 获取docx文本* @param filePath* @return* @throws IOException*/private static String readDocxText(String filePath) throws IOException {try (InputStream inputStream = new FileInputStream(filePath);XWPFDocument document = new XWPFDocument(inputStream)) {XWPFWordExtractor extractor = new XWPFWordExtractor(document);String text = extractor.getText();document.close();return text;}}/*** pdf页数* @param filePath* @return* @throws IOException*/private static String readOfdText(String filePath) throws IOException {Path txtPath = Paths.get("DOCUMENT_PAGE_TEMP", FilenameUtils.getBaseName(filePath) + ".txt");TextExporter textExporter = new TextExporter(Paths.get(filePath), txtPath);textExporter.export();String s = FileUtil.readUtf8String(txtPath.toFile());textExporter.close();return s;}/*** 获取文件文本* @param tempFile* @return*/public static String readText(File tempFile) {return readText(tempFile.getPath());}// Add methods for other document types as needed
}

3. 文案转换

• ofd转换

• • ①启动加载字体

    /*** 前置系统数据加载*/private static void systemInit() {FontLoader preload = FontLoader.Preload();preload.scanFontDir(Paths.get(FileUtil.local, "font"));Field namePathMapping = ReflectUtil.getField(FontLoader.class, "fontNamePathMapping");Map<String, String> fontNamePathMapping = (Map<String, String>) ReflectUtil.getFieldValue(preload,namePathMapping);System.out.println("加载字体:" + JSONUtil.toJsonStr(fontNamePathMapping.keySet()));}

• • ②使用ofdrw进行pdf转换

    /*** 将OFD转换为PDF** @param ofdPath OFD路径* @param distPath 输出路径* @param pdfPath 输出PDF路径* @throws IOException*/public static void convertOfdToPDFByBridge(String ofdPath, String distPath, String pdfPath) throws IOException {log.debug("解析文件:{}",ofdPath);Path ofdFilePath = Paths.get(ofdPath);Path dir = Paths.get(distPath);PDFExporterIText exporter = new PDFExporterIText(ofdFilePath, Paths.get(pdfPath));exporter.export();exporter.close();}

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